The Açude Rivaldo de Carvalho is a reservoir located in the municipality of Catarina, within the state of Ceará in northeastern Brazil. It is situated in the Alto Jaguaribe system, with its waters impounding the Riacho Condado. The reservoir has a drainage basin area of 307.16 square kilometers and a total storage capacity of 20,750,000 cubic meters. The surrounding region is part of the Brazilian semi-arid zone, which fundamentally shapes its character. The reservoir's primary function is water supply, with uses including rural and urban consumption. Its operational status and water levels are subject to the region's highly variable rainfall patterns, and the structure is capable of spilling, or "sangra," during periods of significant inflow. The landscape is defined by the Caatinga biome, offering a distinct, arid aesthetic. Specific details regarding direct paddler access points, formal routes, seasonal water temperatures, water quality, on-site facilities for recreational users, or explicit paddling regulations are not detailed. Paddlers should be aware that as a managed water supply reservoir, recreational access may be restricted or secondary to operational needs, and prior local inquiry is essential. The experience is likely characterized by a remote, utilitarian atmosphere rather than a developed recreational destination, with the potential for significant fluctuations in water level based on seasonal rains and management priorities.